| City: | Mason City, Iowa |
| County: | Cerro Gordo County |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 7:11:10 AM |
| Population: | No Population Data |
| Area Code: | 641 |
| Classification: | PO Box |
| Coordinates: | 43.1501, -93.1021 |
| Quick Link: |
ZIP code 50402 isn't a town. It's a commercial point location within Mason City, Iowa. This PO Box classified ZIP exists as a point inside the larger 50401 ZIP code, which serves as Mason City's primary postal zone. With zero residential population and no geographic territory, 50402 functions purely as a business mail destination.
The numbers tell the story: 163 PO Boxes, 193 business delivery points, and 532 employees working at just 20 establishments. That's an average of over 26 employees per business, suggesting substantial commercial operations. All delivery records point to a single address on N Delaware Avenue, with unit designators indicating a multi-tenant commercial property.
Mason City residents and businesses have options. This isn't a PO Box Only Zone, so street delivery is available through the main 50401 ZIP. The 50402 designation appears to serve a specific commercial complex that needed its own postal identity, likely for mail volume management or corporate identity purposes. Businesses here receive mail through either PO Boxes or street delivery via the one city carrier route assigned to this ZIP.
Only one street exists in this ZIP: N Delaware Avenue, with all 76 records sharing this address and using UNIT designators for individual tenants.
ZIP Code 50402 supports both business and residential activity. According to the Business Census (2024), there are 20 business establishments, employing about 537 people with an annual payroll of $32,970,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 834Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 20Source: CBP |
| 1st Quarter Payroll: | $8,190,000Source: CBP |
| Annual Payroll: | $32,970,000Source: CBP |
| # of Employees: | 537Source: CBP |
ZIP Code 50402 is located in Cerro Gordo County, Iowa, within the Mason City, IA Metropolitan Statistical Area (CBSA 32380) and Iowa's 2nd Congressional District. This Micro area has a population of 51,749 people, about 0.00% of whom live in ZIP Code 50402. It covers 0 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | Mason City, IASource: Census |
| CBSA Number: | 32380Source: Census |
| CBSA Type: | MicroSource: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 51,749Source: Census |
| MSA: | Source: Census |
| Land Area: | --Source: Census |
| Water Area: | --Source: Census |
| Congressional District: | 02Source: USPS |
| Congressional Land Area: | 12261.92 sq miSource: Census |
| PMSA: | Source: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 1950160Source: Census |
| Place Name: | Mason City city; IowaSource: Census |
We could not locate which school district 50402 belongs to, but we will update this once new district data is released. There are no public schools nor private schools with a mailing address in this ZIP Code. Listing Nearby schools instead. It also has 6 colleges, universities or post secondary education institutions nearby which would be a short commute to.
Our sources include trusted federal and licensed data from the United States Postal Service, U.S. Census Bureau, U.S. Geological Survey, Centers for Medicare & Medicaid Services, and the National Center for Education Statistics, along with proprietary datasets created by ZIP-Codes.com. Data last updated on February 1, 2026.